Statistics for occurrence #1 of “Mississippi County” in chapter 22, regiment MO6CavStateMilitia of Frederick H. Dyer, Compendium of the War of the Rebellion: Regimental Histories:

...and Arkansas August and September. Perryville August 26. Scullyville, Ark., August 30-31. Devil's Back Bone September 1. Capture of Fort Smith September 1. Expedition to Big Lake. Mississippi County September 7-30 (Detachment). Horse Creek September 17. March to Springfield, Mo., arriving September 18. Operations against Shelby and pursuit to Arkansas River September 22-October 26. ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Mississippi County (Missouri, United States) 26 12 2 2 0 user votes
Mississippi County (Arkansas, United States) 0 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.